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Three-phase llc power supply circuit for high voltage bus input

a power supply circuit and high-voltage bus technology, applied in the field of three-phase power systems, can solve the problems of commonly among the largest components and most expensive within the power converter

Active Publication Date: 2022-06-02
ASTEC INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a three-phase power supply circuit that includes three LLC resonant voltage convertors, three step-down transformers, and a bridge rectifier. The circuit is designed to handle high voltage direct current inputs and provide efficient and reliable power conversion. The technical effects of the invention include reducing switching losses and improving power density and efficiency. The disclosed circuit can be used in a variety of applications such as telecom systems and fast chargers for electric vehicles.

Problems solved by technology

Since these components must withstand large switching currents and voltage stresses, they are commonly among the largest components and most expensive within the power converter.

Method used

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  • Three-phase llc power supply circuit for high voltage bus input
  • Three-phase llc power supply circuit for high voltage bus input
  • Three-phase llc power supply circuit for high voltage bus input

Examples

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Embodiment Construction

[0026]The example embodiments described herein illustrate different methods for constructing a three-phase power supply circuit including three LLC resonant voltage convertors suitable for high voltage direct current (DC) inputs. Each LLC resonant voltage convertor is coupled with a step-down transformer, and the secondary coils of the three step-down transformers are electrically coupled together in a star formation. This configuration reduces switching current, voltage stress, and transformer primary root mean square (RMS) currents, resulting in improved efficiency.

[0027]FIG. 1 illustrates an exemplary single-phase LLC resonant voltage convertor 100. In this example embodiment, input voltage VIN 102 is applied to inputs of the voltage convertor across capacitors C6 116 and C7 117 which act to divide the input voltage VIN 102 in half since the values of C6 116 and C7 117 are the same. In some example embodiments input voltage VIN 102 may be provided by a power factor correction cir...

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Abstract

A three-phase power supply circuit is provided. The power supply circuit includes three LLC resonant voltage convertors, three step-down transformers, and a bridge rectifier. Each step-down transformer includes a primary and secondary coil, and each primary and secondary coil has a first node and a second node. Each step-down transformer is electrically coupled with one of the three LLC resonant voltage convertors by the first and second nodes of the primary coils. The bridge rectifier is electrically coupled with the first node of the secondary coil of each of the three step-down transformers. The second nodes of the secondary coils of each of the three step-down transformers are electrically coupled together.

Description

TECHNICAL FIELD[0001]Aspects of the disclosure are related to electronic components and in particular to components for three-phase power systems.TECHNICAL BACKGROUND[0002]Three-phase LLC power converters are commonly used in a variety of systems including telecom systems, fast chargers for electric vehicles, and other applications requiring high power density and high efficiency.[0003]These three-phase LLC power converters typically include an inductor / transformer pair for each of the three phases. Since these components must withstand large switching currents and voltage stresses, they are commonly among the largest components and most expensive within the power converter.OVERVIEW[0004]In an embodiment, a three-phase power supply circuit is provided. The power supply circuit includes three LLC resonant voltage convertors, three step-down transformers, and a bridge rectifier. Each step-down transformer includes a primary and secondary coil, and each primary and secondary coil has a...

Claims

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Application Information

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IPC IPC(8): H02M3/335H01F27/24H03K19/20H03K3/037H02M1/44
CPCH02M3/33569H01F27/24H02M1/44H03K3/037H03K19/20H02M3/33571H02M1/0064H02M3/003H02M3/285H02M1/0085H02M3/01H02M1/0043H02M3/33592H01F3/14H01F30/12H01F27/40Y02B70/10
Inventor SIGAMANI, JAMES
Owner ASTEC INT LTD